I've never heard of {or Heard} any of those artists. I probably know less than anyone on this site about reggae. But one British artist that has allways appealed to me, made a few sucessfull stabs at the reggae genre.
In my opinion that is.....
Not exactly your time frame either. {I never seem to play by the rules, do i?}
I think that he may even like Clapton, thus making him immediately suspect.....but here go's:
Eric Burden.
Here's the examples of why i thought so at the time, and still do.

The old Jimmy Cliff nugget 'Many Rivers to Cross'. I think eric's version kills,
From the 'Before we were so rudely interrupted' LP 1977